Demountable rim



T. E. DUNBARQ QEMOUNTABLE RIM. APPLICATIQN FILED MAY 29, 1920.

1 89,345 I Patented Aug. 30, 1921..

2 SHEETSSHEET I.

NlTNEsSEs J5 ATTORNEY T. E. DUNBAR.

DEMQUNTABLE RIM.

APPLlCATlON FILED MAY 29, 1920.

Patented Aug. 30, 1921.

- e5 2 SHEETS-SHEET 2- 1 0 3 6 Z 7 IIII maJZ/ZMZQZTNVENTOR WITNESSES ATTO R N EY UNITED STATES PATENT OFFICE.

THOMAS EDGAR DUNBALR, OF LAKELAND, FLORIDA, ASSIGNOR OF ONE-HALF TO H. GREVASSE AND JOHN Id- HOGAN, BOTH OF LAKELAND, FLORIDA.

DEMQUNTAIBLE RIM.

- Application filed May 29,

To all whom it may concern:

Be it known that I, THOMAS E. DUNBAR, a citizen of the United States, residing at Lakeland, in the county of Polk and State of Florida, have invented a new and useful Demountable Rim, of which the following is a specification.

The present invention relates to demountable rims.

The object of the invention is to provide a rim for pneumatic tires which may be readily placed upon the wheel or removed therefrom without the use of any special tools and without requiring any particular skill.

Another object is to provide a segmental rim whose. parts will not become detached even though a blow-out occurs. a

A further object is to provide a rim capable of being used on any and all makes of wheels.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawings forming part of this specification,.with the understanding, however, that the invention is not confined to any strict conformity with the showing in the drawings, but may be changed and modified so long as such changes and modifications mark no material departure from the salient features of the invention as ex pressed in the appended claims.

In the drawings,

Figure 1- is an elevation of a rim constructed in accordance with the principles of the invention.

Fi 2 is a detail cross-sectional view showing the interlocking construction by which the segments of the rim are joined.

Fig. 3 is a detail showing the latching means for locking the segments together at one of the joints. 7

Fig. 4 is a longitudinal cross-section through the latching means.

Fig. 5 is a view from the inside of the rim showing the interlocking connection of Fig. 2.'

Fig. 6 is a cross-section on the line 66 of Fig. 5.

Fig. 7 is a perspective view of the key.

The demountable rim comprises a pair of arcuate flanged segments each comprising substantially a semi-circumference, the segment being denoted generally by the refe Specification of Letters Patent.

Patented Aug. 30, 1921. 1920. Serial No. 385,281.

ence numerals 8 and 9. The segment 8 has annular outstanding flanges 10 as is common with demountable rims, and the seg ment 9 has similar flanges 11. One of the segments, as 9, has a perforation 16 at any desirable point to admit the valve stem. The arcuate segments, where meeting, provide two joints, one of which is bridged by a latch 12 pivoted by a rivet or the like 18 to one of the segments, as 8, and engaging with a stud 15 secured to the other segment. This latch is provided on the inner face of the rim and has a slot 1 1 near its free end for engagement with the stud 15. The latch member fits against the under sides of the two segments where meeting and prevents separation thereof at the corresponding oint.

A second joint is provided at a point diametrically opposite the joint bridged by the latch member 12. At this second joint one of the segments, as segment 8, is provided with an eye 17 formed integrally therewith and of reduced width. The other segment, as 9, has a pair of eyes 18 each of which is formed like the eye 17 and comprises an elongated loop whose free end 18 is bent down close to the inner face of the segment 9. The eyes 18 have a considerable less width than the eye 17 and are spaced apart to provide a space in which the eye-17 may fit. The combined width of the two eyes 18 and the eye 17 is equal to that of the inner face of the rim, as shown in Fig. 5. The free end 17 of the eye 17 is bent inwardly against the segment 8.

WVhen the eye 17 is brought into alinement transversely of the rim with the eyes 18, there is a space providing a keyway, which keyway receives a key 19 in the manner shown in Figs. 2 and 6. The key 19 has a wing 20 which, when the key is in looking position, provides substantially a continuation of the flanges 10 and 11 which are broken away as indicated at 21, short of the locking joint. The eyes 17, 18 are flattened or elongated and curved longitudinally to conform to the curvature of the rim. The curve of the eyes is indicated in Fig. 2. The key 19 is likewise appropriately curved transversely to be accommodated by the alined eyes. The wing 20 of the key fits into the gap between the flanges 10 and 11 to provide substantially a continuous flange on that side of the rim. On the other side of the rim, flanges 10 and 11 are in abutment, as seen.

What is claimed is 1. A demountable rim comprising a pair of semi-circular flanged segments, a latch holding the segments together at one joint, flattened eyes provided upon the segments at the diametrically opposite joint, and a key passed through the alined eyes and locking the segments together, said key being readily withdrawn from one side of the rim.

2. A locking connection for demountable flanged rims having a joint, comprising alinable eyes provided on the two sides of the joint, and a key passing through the eyes, the rim having one flange broken away at the joint, the key having a wing fitting in the broken away portion of the flange to form substantially a continuation thereof.

3. A locking connection for demountable flanged rims having a joint, comprising alinable eyes provided on the two sides of the joint, said eyes being elongated and curved longitudinally to conform to the curvature of the rim, and a key passing through the eyes and curved transversely.

4:. A locking connection for demountable flanged rims having a joint, comprising alinable eyes provided on the two sides of the joint, said eyes being in the form of a flat tened loop, the joint having a single eye on one side and on the other side a pair of eyes spaced apart and receiving between them the first-mentioned eye, the eyes being alinable transversely of the rim and the middle eye having considerably greater width than either of the other eyes, the combined width of the three alined eyes being substantially the width of the rim, and means passing through the eyes to lock the segments together.

5. A locking connection for demountable flanged rims having a joint, comprising alin' able eyes provided on the two sides-of the joint, said eyes being-in the form of a flattened loop, the eyes being in alinement transversely of the rim and the middle eye having considerably greater width than either of the other eyes, the combined width of the three alined eyes being substantially the width of the rim, and a key having a length equal to the width of the rim and passing through the alined eyes to hold the segments together. 7

6. A locking connection for demountable flanged rims having a joint comprising alinable eyes provided on the two sides of the joint, and a key passing through the, eyes, the rim having one flange broken away at the joint, the key having a wing fitting in the broken away portion of the flange to form substantially a continuation thereof, said eyes being elongated and curved longitudinally to conform to the curvature of the rim.

7 A locking connection for demountable flanged rims having a oint, comprising ali'nable eyes provided on the two sides of the joint, said eyes being in the form of a flattened loop, the oint having a single eye on one side and on the other side a .pair of eyes spaced apart and receiving between them,

the first-mentioned eye, the eyes being alinable transversely of the rim and the middle eye having considerably greater width than either of the other eyes, the combined width of the three alined eyes being substantially the width of the rim, and means passing through the eyes to lock the segments together.

In testimony, that I claim the foregoing as my own, I have hereto aflixed my signature.

THOMAS EDGAR DUNBAR. 

